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1.
建立了毛细管气相色谱法测定巴胺磷溶液含量的方法。试验采用6%氰丙基苯基-94%二甲基硅氧烷为固定相的毛细管柱,柱温240 ℃,进样口温度250 ℃,FID检测器温度250 ℃,载气为氮气,流速3 mL/min,进样量1 μL,分流比15 : 1,内标物质为邻苯二甲酸二丁酯。在该色谱条件下,巴胺磷峰与内标物质峰分离度良好,方法平均回收率为103.5%(n=9,RSD=1.7%),重复性RSD为0.6%,定量限为2.5 μg/mL,巴胺磷在0.025~0.5 mg/mL浓度范围内呈良好的线性关系(r2=0.9999),不同色谱柱、柱温、流速、进样口温度、检测器温度耐用性良好。结果表明,建立的方法专属性好、快速、准确,可用于测定巴胺磷溶液的含量。 相似文献
2.
《中国畜牧兽医》2020,(7)
试验旨在建立测定马香苓口服液中百秋李醇含量的研究方法。本研究采用气相色谱法,其色谱条件是使用色谱柱HP-5毛细管柱;柱温采用程序升温(初始温度150℃,保持18 min,以50℃/min速率升至280℃,保持5 min);进样口温度为280℃;载气:高纯氮气;流速1 mL/min;进样量1μL,分流比20∶1;检测器为氢火焰离子化检测器,温度为280℃;氢气流速40 mL/min,空气流速370 mL/min;分别进行系统适用性试验、专属性试验、线性范围考察、检测限和定量限的确定、精密度试验、稳定性试验、重复性试验、加样回收率试验、耐用性试验,并对10批样品进行了含量测定。结果显示,专属性溶液中的溶剂峰、药液的杂质峰与主成分峰能达到有效分离且分离度符合要求(R≥1.5),表明该方法系统适用性良好;阴性对照溶液未检出色谱峰,表明样品中其他成分不干扰测定;百秋李醇定量限和检测限分别为2.842和0.812μg/mL;百秋李醇检测质量浓度在15.86～1 015μg/mL范围内与峰面积积分值呈良好的线性关系(y=0.869x-10.45,R~2=0.999,n=7)。精密度试验、稳定性试验(日内和日间精密度)、重复性试验的平均RSD分别为0.90%、1.63%和1.83%、2.90%,其RSD均在可控范围内(RSD≤3%);平均加样回收率为95.36%,RSD=2.82%(n=6),表明所建立的气相色谱法检测百秋李醇的含量回收率良好;进行耐用性试验,最终验证所建立的色谱方法可以稳定检测百秋李醇的含量。经方法学验证,该方法准确稳定,简便可行,能够作为马香苓口服液君药广藿香中百秋李醇的含量控制方法,同时也为该制剂质量控制提供了一种有效的检测方法,暂定本品中广藿香药材按百秋李醇计不少于47.53μg/mL。 相似文献
3.
《中国兽药杂志》2020,(2)
建立了高效液相色谱法(HPLC)测定兽用除虫脲原料药含量及有关杂质的检测方法。采用C18色谱柱(250 mm×4.6 mm,5μm),以甲醇为流动相A,0.01 mol/L乙酸铵溶液为流动相B,进行梯度洗脱,流速1.0 mL/min,检测波长254 nm,进样量10μL,柱温25℃。除虫脲的线性范围为10～1000μg/mL(R~2=0.999),回收率97.01%～100.83%(RSD1.0%,n=3),精密度(RSD=0.13%,n=9)、重复性(RSD=0.45%,n=6)良好,主成分与各杂质峰分离良好。以主成分自身对照法计算,各杂质峰面积的和不得大于对照溶液主峰面积的0.1倍(0.1%)。该方法简便灵敏,结果准确可靠,可作兽用除虫脲原料药含量及有关杂质测定。 相似文献
4.
建立了高效液相色谱法(HPLC)测定兽用除虫脲原料药含量及有关杂质的检测方法。采用C18色谱柱(250 mm×4.6 mm,5μm),以甲醇为流动相A,0.01 mol/L乙酸铵溶液为流动相B,进行梯度洗脱,流速1.0 mL/min,检测波长254 nm,进样量10μL,柱温25℃。除虫脲的线性范围为10~1000μg/mL(R 2=0.999),回收率97.01%~100.83%(RSD<1.0%,n=3),精密度(RSD=0.13%,n=9)、重复性(RSD=0.45%,n=6)良好,主成分与各杂质峰分离良好。以主成分自身对照法计算,各杂质峰面积的和不得大于对照溶液主峰面积的0.1倍(0.1%)。该方法简便灵敏,结果准确可靠,可作兽用除虫脲原料药含量及有关杂质测定。 相似文献
5.
建立了测定普抗合剂中黄芩苷含量的反相高效液相色谱法。采用Symmetry C18分析柱(150 mm×4.6 mm,5μm);流动相为甲醇-0.006%磷酸(50∶50);流速1.0 mL/m in;色谱柱温度25℃;检测波长278 nm;进样体积10μL;外标法计算含量。结果表明,黄芩苷进样量在0.412~4.12μg范围内,其色谱峰面积与进样量间有良好的线性关系,r=0.999 5,n=5,回收率为99.48%,RSD=1.07%(n=5)。该方法可用于控制普抗合剂中黄芩苷含量。 相似文献
6.
试验旨在建立测定马香苓口服液中百秋李醇含量的研究方法。本研究采用气相色谱法,其色谱条件是使用色谱柱HP-5毛细管柱;柱温采用程序升温（初始温度150 ℃,保持18 min,以50 ℃/min速率升至280 ℃,保持5 min）;进样口温度为280 ℃;载气：高纯氮气;流速1 mL/min;进样量1 μL,分流比20：1;检测器为氢火焰离子化检测器,温度为280 ℃;氢气流速40 mL/min,空气流速370 mL/min;分别进行系统适用性试验、专属性试验、线性范围考察、检测限和定量限的确定、精密度试验、稳定性试验、重复性试验、加样回收率试验、耐用性试验,并对10批样品进行了含量测定。结果显示,专属性溶液中的溶剂峰、药液的杂质峰与主成分峰能达到有效分离且分离度符合要求（R ≥ 1.5）,表明该方法系统适用性良好;阴性对照溶液未检出色谱峰,表明样品中其他成分不干扰测定;百秋李醇定量限和检测限分别为2.842和0.812 μg/mL;百秋李醇检测质量浓度在15.86~1 015 μg/mL范围内与峰面积积分值呈良好的线性关系（y=0.869x-10.45,R2=0.999,n=7）。精密度试验、稳定性试验（日内和日间精密度）、重复性试验的平均RSD分别为0.90%、1.63%和1.83%、2.90%,其RSD均在可控范围内（RSD ≤ 3%）;平均加样回收率为95.36%,RSD=2.82%（n=6）,表明所建立的气相色谱法检测百秋李醇的含量回收率良好;进行耐用性试验,最终验证所建立的色谱方法可以稳定检测百秋李醇的含量。经方法学验证,该方法准确稳定,简便可行,能够作为马香苓口服液君药广藿香中百秋李醇的含量控制方法,同时也为该制剂质量控制提供了一种有效的检测方法,暂定本品中广藿香药材按百秋李醇计不少于47.53 μg/mL。 相似文献
7.
《中兽医医药杂志》2020,(5)
建立梯度洗脱HPLC法同时测定4种解热镇痛类药物的含量方法。采用十八烷基硅烷键合硅胶色谱柱(4.6 mm×250 mm,5μm),以甲醇-0.05 mol/L醋酸铵溶液为流动相进行梯度洗脱,流速1.0 mL/min,柱温为30℃,检测波长254 nm。结果表明,在该色谱条件下,对乙酰氨基酚、安乃近、安替比林、氨基比林分离良好;对乙酰氨基酚在50～500μg/mL范围内线性良好,R=0.999 8,平均回收率为99.2%(n=9),RSD为0.6%;安乃近在10～250μg/mL范围内线性良好,R=0.999 8,平均回收率为100.6%(n=9),RSD为0.8%;安替比林在10～100μg/mL范围内线性良好,R=0.999 6,平均回收率为99.4%(n=9),RSD为1.0%;氨基比林在10～250μg/mL范围内线性良好,R=0.999 7,平均回收率为98.9%(n=9),RSD为0.8%。本测定方法操作简便,结果准确、可靠,可用于同时测定以上4种解热镇痛类药物的含量。 相似文献
8.
目的：建立用气相色谱法测定肉桂油中桂皮醛的含量。方法：以OV-1弹性石英毛细管色谱柱(30m×0.25mm×0.25μm)为固定相,FID检测器,进样口温度230℃,检测器温度250℃,采用程序升温,柱温100℃,保持1min,然后以15℃/min的速率升至220℃,保持8min,载气为氮气,以正十八烷为内标,按内标法计算桂皮醛含量。结果：桂皮醛进样量在1.6~4.8mg/ml范围内其峰面积与进样量呈良好线性关系。y=0.1451x+0.1282,(r=0.9994);加样回收率为101.03%,RSD为0.53%(n=9)。结论该方法灵敏、简便,结果准确可靠,可作为控制肉桂油质量的方法。 相似文献
9.
目的:建立用气相色谱法测定肉桂油中桂皮醛的含量。方法:以OV-1弹性石英毛细管色谱柱(30m×0.25mm×0.25μm)为固定相,FID检测器,进样口温度230℃,检测器温度250℃,采用程序升温,柱温100℃,保持1min,然后以15℃/min的速率升至220℃,保持8min,载气为氮气,以正十八烷为内标,按内标法计算桂皮醛含量。结果:桂皮醛进样量在1.6~4.8mg/ml范围内其峰面积与进样量呈良好线性关系。y=0.1451x+0.1282,(r=0.9994);加样回收率为101.03%,RSD为0.53%(n=9)。结论该方法灵敏、简便,结果准确可靠,可作为控制肉桂油质量的方法。 相似文献
10.
用毛细管气相色谱法测定饲料添加剂维生素E原料中维生素E含量.以正三十二烷为内标物,采用DB-1毛细管柱(30 m×0.25 mm×0.25um),FID检测器;氮气为载气;柱温为280～290℃,检测器温度为290～300℃;进样口温度为290-300℃;无分流进样.在此色谱条件下,维生素E和内标物正三十二烷分离良好,在0.994～4.013 mg/mL浓度范围内呈良好线性关系,r=0.9998,经方法评估函数的评价表明,方法不存在恒定系统误差和相关性系统误差,方法准确性较好.本法操作简便易行,系统适用性良好,适用于饲料添加剂维生素E原料中维生素E含量测定. 相似文献
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马拉硫磷化学名为O,O—二甲基-S-(1,2—二乙氧羰基乙基)二硫代磷酸酯,又名4049,马拉松,马拉塞翁等。化学式C10H19O6PS2,相对质量330.37,沸点156℃。它是一种高效低毒,性质优良的有机磷杀虫剂,常拌于粮食、饲料中作防护剂,防止害虫的产生。 相似文献
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Bovine Tolerance for Malathion: An Experiment in Relation to a Case Report 总被引：1，自引：0，他引：1 
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下载免费PDF全文 W. O. Haufe 《Canadian journal of veterinary research》1965,29(4):102-107
Three purebred Shorthorn cattle were tested for susceptibility to malathion toxicity. They were subjects of a case report in which symptoms had been interpreted as organophosphate poisoning following the recommended pesticidal treatment for lice. Animals were experimentally overdosed with a malathion spray at three-week intervals. Individual treatments exceeded 20 times and cumulative treatments 50 times the recommended dose. No clinical symptoms could be detected at any time during or after treatment. A depression of approximately 20-30 per cent in blood cholinesterase was the only subclinical effect of toxicity observed. Variations in body weight remained within the range expected for mature animals on a maintenance diet. 相似文献
15.
A study was conducted to determine whether a combination of vitamin E and selenium was able to counteract the immunosuppressive
effects of chronic toxicity of malathion in chicks. The chicks were divided into three groups. The first group received malathion
10 mg/kg body weight; the second group received the same dose of malathion but was supplemented with vitamin E and selenium
for 60 days; and the third group served as the control. The concentration of total immunoglobulins and circulatory immune
complexes decreased following the administration of malathion, whereas the supplementation of the diet with vitamin E and
selenium partially counteracted this effect. The histopathological changes in the bursa of Fabricius due to malathion were
consistent with these findings. Supplementation with vitamin E and selenium partially ameliorated the degenerative changes
in the bursa of Fabricius.
Sodhi, S., Sharma, A. and Brar, R.S., 2006. A protective effect of vitamin E and selenium in ameliorating the immunotoxicity
of malathion in chicks. Veterinary Research Communications, 30(8), 935–942 相似文献
16.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。 相似文献
17.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections
of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal
(GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April
2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs
located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming
areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology
laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum
columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying
degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal
abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy
season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different
nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those
observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes.
But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the
results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia. 相似文献
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Tropical Animal Health and Production - 相似文献
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Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks. 相似文献
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H Hayashi T Yoshimura J Y Chen 《Comparative immunology, microbiology and infectious diseases》1985,8(2):73-87
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed. 相似文献